The liner was in an uproar. News of the murder had spread like wild-fire. Women were screaming hysterically and men shouting as they rushed about in terror, believing that the ship was in the hands of pirates. A squad of sailors passed on the double to take charge of the buffet. There would be an inquest shortly. Penrun started for his stateroom. He wanted to be alone a few minutes before the inquest took place. His room was on the deck above. The sight of the empty passage relieved him, but he was surprised to discover that he had not locked the door when he left an hour ago. He stepped into the room. Instantly his hands shot upward. Something was prodding him in the back. "One move or a sound, and I shoot," warned a sharp whisper. "Stand as you are till I find what I want." His billfold was opened and dropped with an exclamation of disappointment. The searcher hurried. Penrun calmly noted that the fingers seemed to fumble and were not at all deft at this sort of work. He glanced down, and smiled grimly. A woman! He jerked his body away from the prodding pistol, gripped the slender hand that was about to plunge into his coat pocket, and whirled round, catching the intruder in his arms. Big, terrified dark eyes stared up at him out of a pale, heart-shaped face. Then with a sob the girl wrenched free, ran out of the door and was gone. * * * * * He did not follow, but instead carefully locked the door and placed a chair against it. Things had been moving too rapidly for him to feel sure he was safe even now. Opening his left hand, he gazed down at a bit of crumpled yellow paper he was holding there. That much he had saved of the message from his long dead grandfather when the murderer grabbed the folded paper from the buffet table and fled. It proved to be the bottom third of a sheet of heavy paper, and on it was drawn a piece of a map, showing a large semi-circle, which might have been a lake, and leading off from it were what might be a number of crooked canals. At the end of one of these was an "X" and the word "Here." Below the sketch were some words that had not been torn off. He read them with growing amazement. "... aves of Titan. I swear this to be the true and correct place of concealment of ... may he who comes to possess it do much good and penance, for it is drenched in blood and ... Captain Orion Halkon." Penrun sat for a long time in thought. Titan, the sixth moon of Saturn! Nightmare of killing heat, iron cold, and monstrous spiders! How many men had died trying to explore it! And who knew it better than Penrun himself, the only one who had ever escaped from that hellish cavern of the Living Dead? Old Halkon had hidden his treasure well indeed. Penrun had never found the Caves. Legend described them as the one safe place on the satellite where a man might live without danger of being attacked by the spiders because the Caves were too cold for them.